This Washington Post-ABC News poll was conducted by telephone Apr. 11-14, 2013, among a random national sample of 1,003 adults, including landline and cell phone-only respondents. Interviews were conducted in English and Spanish
The results from the full survey have a margin of sampling error of plus or minus 3.5 percentage points. Sampling, data collection and tabulation by Abt-SRBI of New York.
Produced for the Washington Post by Capital Insight.